EP2929823A1 - Vacuum cleaner filter bag for an upright vacuum cleaner - Google Patents

Abstract

The present invention relates to a vacuum cleaner filter bag for an upright vacuum cleaner. The vacuum cleaner filter bag according to the invention has a greater length than width, wherein a longitudinal side and a narrow side results. It is formed by two bag walls, which are circumferentially connected to each other, so that an interior space is formed between the two bag walls. A bag wall in this case has an inlet opening through which air to be purified can flow into the vacuum cleaner filter bag. The vacuum cleaner filter bag according to the invention is characterized in that the bag wall, in which the inlet opening is introduced, opposite to a bag wall, which has a folding extending in the longitudinal direction of the vacuum cleaner filter bag. The folding gives this bag wall increased flexibility, whereby the vacuum cleaner filter bag, for example, at the onset or by a first entering through the inlet opening airflow can be fully opened because the air can flow into the filter bag substantially unhindered.

Description

The present invention relates to a vacuum cleaner filter bag for an upright vacuum cleaner. The vacuum cleaner filter bag according to the invention has a greater length than width, wherein a longitudinal side and a narrow side results. It is formed by two bag walls, which are circumferentially connected to each other, so that an interior space is formed between the two bag walls. A bag wall in this case has an inlet opening through which air to be purified can flow into the vacuum cleaner filter bag. The vacuum cleaner filter bag according to the invention is characterized in that the bag wall, in which the inlet opening is introduced, opposite to a bag wall, which has a folding extending in the longitudinal direction of the vacuum cleaner filter bag. The folding gives this bag wall increased flexibility, whereby the vacuum cleaner filter bag, for example, at the onset or by a first entering through the inlet opening airflow can be fully opened because the air can flow into the filter bag substantially unhindered. Various vacuum cleaner filter bag molds are known in the art. For paper filter bags, block or block bottom filter bags are in common use. In filter bags made of nonwovens such forms are difficult to realize production technology. Therefore, filter bags made of nonwoven fabrics are mainly produced as flat bags. Significant efforts have been made to develop filter bags made of nonwovens, which is to ensure a particularly good adaptation to a bag receiving space. Such filter bags made of nonwovens, which are modeled on the known block or block bottom filter bag design in terms of design, are commonly referred to as a 3D filter bag. Such 3D filter bags are understood to mean filter bags which, in addition to an upper side and a lower side, also have additional sides of the bag. In vacuum cleaners, as they are common in Europe, are used almost exclusively non-woven filter bags as flat bags and flat bags with gussets. In the United States and Great Britain, vacuum cleaner types of the so-called upright design are mainly used, for which mainly block bottom bags made of filter paper are used. Upright vacuum cleaners are characterized by the fact that they have a cleaning head, in which the motor is integrated. On this cleaning head a collecting vessel is mounted, in which the appropriate vacuum cleaner filter bag for the Upright vacuum cleaner is used. The vacuum cleaner filter bags for upright vacuum cleaners are characterized by a greater length-to-width ratio. An upright vacuum cleaner is eg from the EP 2 030 552 A2 known. With regard to the spatial dimensioning and structural details, reference is also made for the purposes of the present invention, in particular to the disclosure content of this patent application.

Especially with flat bags made of nonwovens, various folds are known to increase the effective filter surfaces.

For example, the DE 20 2005 000 918 U1 a vacuum cleaner filter bag having a wall made of weldable flexible filter material, which has foldings on two opposite sides, wherein in the operating state of the vacuum cleaner filter bag, an enlargement of the volume of the filter bag by protuberance of this folding is achieved.

A comparable vacuum cleaner filter bag, in which these foldings are present on all four sides, is from the DE 20 2005 000 917 U1 known.

A development of this concept is from the WO 00764320 known, wherein the vacuum cleaner filter bag shown there has several lateral folds, which evaginated in the operating state of the vacuum cleaner filter bag and lead to an increase in the bag volume.

A particularly effective enlargement of the vacuum cleaner filter bag volume is from the EP 2 366 321 A1 known. The specialized bag presented there has a plurality of folds of the bag walls, so that the vacuum cleaner filter bag volume and the dust storage capacity are effectively increased.

In vacuum cleaner filter bags made of nonwovens for Upright vacuum cleaner, however, in principle, another problem.

These vacuum cleaner filter bags are chosen from a large volume, so it does not primarily depend on the enlargement of the already enormous volume of the vacuum cleaner filter bag. A non-woven fabric flat filter bag sized for the volume of the Upright vacuum cleaner can only be used to a limited extent in a Upright vacuum cleaner. Such a filter bag unfolds - depending on the installation situation in the filter bag receiving space of a Upright vacuum cleaner not or only partially. The main problem is that a corresponding flat bag made of nonwoven fabric does not unfold completely from the storage condition. In addition, there is the problem that it comes to inserting a flat filter bag in the upright vacuum cleaner kinks in the filter bag, so that the actual geometry of the filter bag is permanently distorted. This further enhances the above-mentioned unfolding problem, as well as the theoretical filling volume and the homogeneous distribution of the absorbed dust in the filter bag are permanently impaired. Prolonged operation can thus lead to clogging of the not yet fully unfolded vacuum cleaner filter bag, thereby resulting in a significant reduction in volume and a loss of volume to be filled is observed. The lifetime of such Upright filter bag can thereby significantly reduce.

It is therefore an object of the present invention to further develop the specific type of upright vacuum cleaner filter bags and, in particular, to ensure that full deployment is enabled before or at the first start-up of the vacuum cleaner filter bag.

It is likewise an object of the present invention to specify uses of the upright vacuum cleaner filter bag according to the invention, as well as to specify a method for its production.

This object is achieved with respect to a vacuum cleaner filter bag with the features of claim 1, with respect to uses of the vacuum cleaner filter bag having the features of claim 12 and with respect to a method for producing the vacuum cleaner filter bag with the features of claim 13. The respective dependent claims are advantageous developments.

The invention thus relates to a vacuum cleaner filter bag for an upright vacuum cleaner having a length and a width in a ratio of> 1.5, so that the vacuum cleaner filter bag has a longitudinal side and a narrow side, with a first bag wall comprising a filter material, a second one Filter bag material comprising bag wall, wherein the first and second bag wall peripherally connected circumferentially, so that the vacuum cleaner filter bag is completely closed and between the first and the second bag wall an interior is formed, introduced into the second bag wall inlet opening, through the air to be cleaned in the Vacuum cleaner filter bag can flow as well as an inlet opening enclosing the holding plate, wherein at least the first bag wall comprises at least a first and a second gusset, extending in the longitudinal direction of the vacuum cleaner filter bag folding, wherein the first and second Se Itenfalte parallel or substantially parallel to each other, the first gusset has two legs, and the aspect ratio of the leg to the leg of 0.1 to 0.8.

Due to the length-to-width ratio of> 1.5, the vacuum cleaner filter bag has a longitudinal side and a narrow side. The first bag wall of the vacuum cleaner filter bag has the fold. The second bag wall, which lies opposite the first bag wall, has the holding plate together with the inlet opening. As a result of the present folding on the first bag wall according to the invention, the first bag wall has an enlarged surface compared to the surface formed by the outlines of the filter bag. The folding is involved at the edge in the two bag walls circumferential fixation, i. the superposed legs are in this case connected to each other in the fixation. In the bag wall itself, however, the folding is loose and flexible. If a vacuum cleaner filter bag according to the invention is now inserted into the filter space of the upright vacuum cleaner provided for this purpose, the nozzle of the upright vacuum cleaner is introduced into the inlet opening of the vacuum cleaner filter bag and the holding plate is fixed to a catch provided in the upright vacuum cleaner. In this case, the holding plate may be e.g. be moved from its storage position, for example, be tilted by 90 °. If air is now blown into the vacuum cleaner filter bag through the inlet opening, an air flow strikes directly on the first bag wall, which is designed to be extremely flexible due to the folding. Due to the fact that the fold in the first bag wall provides more filter material compared to the nominal contour defined above, the first time the vacuum cleaner filter bag is put into service, full deployment occurs because the incoming air flow directly onto the flexibly configured one first bag wall occurs and thus partially or completely unfolded. Thus, the initially described problem of possibly incomplete deployment of the vacuum cleaner filter bag is effectively prevented. Already when the vacuum cleaner filter bag is put into operation for the first time, it can thus be ensured that it is completely unfolded in the upright vacuum cleaner and thus a maximum filling volume is available.

Each pleat, as the term is used in the context of the present invention, includes two pleat legs and a pleat hinge. Under a fold hinge, the point of a fold becomes the least Curvature radius understood. Through the imaginary connection of the fold hinges a so-called fold axis is obtained. The fold axis is also called pleat back. The fold axis may correspond to the longitudinal axis of a fold. The area of a fold having a radius of curvature greater than the minimum radius of curvature of the fold is referred to as a fold leg. The area lying between the pleat legs of a fold is referred to as a pleated core. The pleat legs of a pleat can thus in particular also have a curvature. Wrinkles can also have turning points. Turning points are those points of a fold, in particular the pleat lobes, at which the curvature of the fold changes from concave to convex. A connecting line connecting several turning points of a fold is called inflexion line (turning line). Two adjacent folds can also share a fold leg. The sequence of multiple folds is referred to as folding in the context of the present invention. In particular, folds can have legs that run parallel to the bag wall. In particular, the pleat legs of the pleats may be smooth. By "smooth" is meant here that the pleat legs have no densifications and / or structuring, in particular to stabilize the shape of the wrinkles. One or more pleat legs of one or more pleats may include one or more embossed structures, particularly where the embossed structures are not used to stabilize the shape of the pleats. As a result, a further enlargement of the area available for filtration can optionally be achieved.

In the invention, it is now essential that the leg of the first fold, which is formed by the portion of the wall extending from the lateral connecting edge of the vacuum cleaner filter bag to the first fold, is longer than the second leg of the first fold, ie the leg formed by the connection of the first and second folds and thus common to first and second folds. Thus, it is ensured that the first fold, but also the second fold in the region between the two lateral connecting lines of the first and second walls of the vacuum cleaner filter bag are arranged in the longitudinal direction. As a result, optimal deployment is ensured when inserting the vacuum cleaner filter bag in the upright vacuum cleaner.

The inventive arrangement or dimensioning of the respective legs of the first fold the fold is formed lying in the vacuum cleaner filter bag according to the invention. By this is meant that the pleat legs of the fold are arranged substantially parallel to the bag wall and come to rest one above the other.

The retainer plate is generally considered herein to be an element of the vacuum cleaner filter bag used to hold the vacuum cleaner filter bag inside a vacuum cleaner housing. The holding plate may in particular be connected to the bag wall of the vacuum cleaner filter bag and arranged in the region of an inflow opening. It may be advantageous to compact the folds having bag wall in a first step, for example by ultrasonic welding, and in a second step to weld the holding plate. For holding the vacuum cleaner filter bag in a vacuum cleaner, the holding plate is connected to a corresponding support member of the vacuum cleaner, in particular brought into engagement. The retaining plate can in principle have any shape. For example, the retaining plate as a flat, planar component as in the EP 1 849 392 shown to be trained. The retaining plate may also have a more complex structure, such as in the DE 20 2008 006 604 shown have.

According to a preferred embodiment, the retaining plate is arranged with the inlet opening near a narrow side edge (i.e., a narrow side) of the vacuum cleaner filter bag. The holding plate is thereby fully accommodated in the second bag wall, i. the support plate does not protrude at any point the sizing of the vacuum cleaner bag finalizing the filter bag, generated by the peripheral connection. In this case, preferably the ratio of the minimum distance of the holding plate to a narrow-side connection of the vacuum cleaner filter bag with respect to a dimensioning of the holding plate in the longitudinal direction of the vacuum cleaner filter bag <0.5, preferably <0.2, particularly preferably from 0.1 to 0.

Alternatively and also preferably, it is arranged that the holding plate with inlet opening in the second wall of the vacuum cleaner filter bag is that the holding plate projects beyond the narrow side of the vacuum cleaner filter bag or projects on this narrow side. It should be noted, however, that the supernatant is to be dimensioned so that the inlet opening is still formed over the entire surface in the wall. Preferably, the ratio of the supernatant of the holding plate to a narrow-side connection of the vacuum cleaner filter bag based on a dimensioning of the holding plate in the longitudinal direction of the vacuum cleaner filter bag <0.5, preferably <0.2, more preferably from 0.1 to 0.01.

Both preferred embodiments described above allow an excellent way of unfolding the vacuum cleaner filter bag according to the invention during insertion and / or the initial start-up in an upright vacuum cleaner provided for this purpose. Due to the attachment of the holding plate as close to the edge as possible, the vacuum cleaner filter bag only has to be slightly curved at this end or distorted by the folding over of the holding plate.

It is further preferred that the folding of the first bag wall of the filter material has a maximum of eight, preferably a maximum of four side folds.

In particular and according to the invention particularly preferred, at least the folding of the first bag wall has four side folds, wherein the fold with respect to the first bag wall is preferably symmetrical.

This embodiment may for example provide that the first bag wall of the vacuum cleaner filter bag has only four folds, which is formed according to the general embodiments described above. The four side folds are attached, at least in the first wall of the vacuum cleaner filter bag. In this case, the symmetry is mirror-inverted with respect to a longitudinal axis of the vacuum cleaner filter bag that extends in the middle so that the first fold is mirror-symmetrical to the third fold and the second fold is mirror-symmetrical to the fourth fold. The fold thus includes a leg connecting the second and fourth folds which forms the front of the wall of the vacuum cleaner filter bag.

A preferred development of this embodiment provides that the first and second fold connecting legs on the side facing away from the interior of the leg, which connects the edge-side connection of the longitudinal side and the first fold, is arranged and comes to rest in a storage state on this. At the same time, the third gusset has two legs, wherein the first leg of the third gusset connects the other edge-side connection of the longitudinal side and the third fold and the second leg connects the third and fourth fold, wherein the leg arranged on the side facing away from the interior of the leg is and comes to rest in a stored condition on this.

The holding plate is preferably arranged in the second bag wall in such a way that it comes to rest in projection onto the first bag wall on the leg connecting the second fold side and a fourth fold side. In other words, this means that the holding plate is arranged relatively centrally with regard to the width dimensioning of the second wall of the vacuum cleaner filter bag.

Furthermore, it may be advantageous in the aforementioned embodiment, when the connecting the second and fourth gusset legs is at least as wide as the width of the holding plate. Preferably, the width of the leg connecting the second and fourth gussets is 1.1 to 5 times the width of the retaining plate.

An alternative embodiment of the vacuum cleaner filter bag according to the invention provides that at least the folding of the first bag wall has eight side folds, the fold being symmetrical with respect to the first bag wall.

This embodiment is similar to the four-fold preferred embodiment described above, the only difference being that there are two more folds in the wall. Thus, the flexibility of the vacuum cleaner filter bag can be further increased.

In this embodiment, it is preferred that the fold is designed such that the respective legs of the respective gussets come to rest in the storage state. The holding plate can then on the Folding opposite second bag wall may be arranged so that it faces in projection of an outermost leg, said leg is preferably at least as wide as the width of the holding plate, more preferably, the width of the leg 1.1 to 5 times the width having the holding plate.

In all embodiments of the vacuum cleaner filter bag according to the invention described above, it is advantageous if the ratio of length to width is greater than 2, preferably greater than 3.

In principle, the second bag wall, i. the bag wall, which comprises the holding plate and which lies opposite the first bag wall with folding, also have a fold. In this case, the fold in the second wall may be formed identically as in the first wall. However, it is preferred that the second bag wall has no folding.

In particular, the filter material of the first and second bag walls is a nonwoven material.

The nonwoven material may comprise one or more layers of nonwoven material. In particular, multiple layers of nonwoven material may be folded together. The bag wall may in particular also comprise or consist of a laminate of several layers, in particular two or more layers. For example, the laminate may be a spunbonded filament spunbonded microfiber spunbonded nonwoven spunbonded nonwoven laminate (SMS laminate). Also, two or more meltblown nonwoven layers may be used (SMMS laminate, SnxMS laminate).

As materials for the bag wall, in particular for the folded nonwoven material, in principle, all known for the production of vacuum cleaner filter bags materials come into consideration. As the nonwoven fabric material, a dry-laid or wet-laid nonwoven fabric or an extrusion nonwoven fabric, particularly a melt-spun microfiber spunbond fabric (meltblown nonwoven fabric) or spunbonded nonwoven fabric, may be used. There may also be additional nanofiber layers. The demarcation between wet laid Nonwovens and conventional wet laid paper are as defined below, as used by the International Association Serving the Nonwoven and Related Industries (EDANA). A conventionally known (filter) paper is therefore not a nonwoven fabric. The nonwoven fabric may comprise staple fibers or continuous fibers. Manufacturing technology can also provide several layers of staple fibers or continuous fibers, which are solidified to exactly one layer of nonwoven fabric. For example, the bag wall, in particular the folded nonwoven material, may comprise a filament spunbond nonwoven laminate and meltblown nonwoven laminate (SMS, SMMS or SnxMS). This laminate may be laminated or calendered by means of a hot melt adhesive. The layer of meltblown nonwoven fabric may be creped. The term nonwoven fabric is used in accordance with the definition of ISO standard ISO 9092: 1988 or CEN standard EN29092. In particular, the terms nonwoven fabric or nonwoven fabric and nonwoven fabric in the field of production of nonwoven fabrics are delimited from one another as follows and also to be understood in the sense of the present invention. To produce a nonwoven fabric fibers and / or filaments are used. The loose or loose and still unconnected fibers and / or filaments are referred to as nonwoven or nonwoven web. By a so-called non-woven binding step, such a non-woven fabric is finally used to form a non-woven fabric which has sufficient strength to be wound into rolls, for example. In other words, a nonwoven fabric is self-supportingly formed by the solidification. (Details on the use of the definitions and / or methods described herein can also Standard work "Nonwovens", W. Albrecht, H. Fuchs, W. Kittelmann, Wiley-VCH, 2000 The nonwoven material may (before the pleats are introduced) for vacuum cleaner filter bags for household use have a basis weight of less than 350 g / m ² , preferably less than 250 g / m ² , more preferably less than 200 g / m ² , in particular between 25 g / m ² and 150 g / m ² . The nonwoven material (before the folds are introduced) also have a basis weight of about 250 g / m ^2. Depending on the mechanical requirement, this may be advantageous, in particular for commercial vacuum cleaner filter bags.

In addition or as an alternative to the developments described, the vacuum cleaner filter bag can have at least one element for flow deflection or flow distribution in the vacuum cleaner filter bag, in particular wherein the element can move in the air flow of the air flowing into the vacuum cleaner filter bag. Such an element is for example from the EP 1 787 560 or the EP 1 804 635 known. For example, such an element may be in the form of at least one strip of material attached to the bag wall inside the vacuum cleaner filter bag, or may comprise such a strip of material. By way of example, such an element may correspond to at least one strip of nonwoven fabric or filter paper or at least comprise a strip of nonwoven fabric or filter paper. The at least one strip of material may be at least partially slotted.

In addition, the present invention relates to the use of a previously described vacuum cleaner filter bag according to the invention as a vacuum cleaner filter bag for an upright vacuum cleaner.

1. a) eine Bahn eines Filtermaterials für eine erste Beutelwand sowie eine Bahn eines Filtermaterials für eine zweite Beutelwand bereitgestellt wird, wobei die Bahn des Filtermaterials für die erste Beutelwand breiter dimensioniert ist wie die Bahn des Filtermaterials für die zweite Beutelwand,
2. b) in zumindest die Bahn des Filtermaterials für die erste Beutelwand eine mindestens eine erste und eine zweite Seitenfalte umfassende Faltung eingebracht wird, so dass die Seitenfalten parallel oder im Wesentlichen parallel zueinander verlaufen, wobei zwei Schenkel entstehen
3. c) die Bahn des Filtermaterials für die erste Beutelwand sowie die Bahn des Filtermaterials für eine zweite Beutelwand übereinander gebracht und randseitig umlaufend verbunden werden, so dass ein vollständig geschlossener Staubsaugerfilterbeutel entsteht, der einen zwischen der ersten und der zweiten Beutelwand ausgebildeten Innenraum aufweist, so dass das Längenverhältnis des die erste und zweite Seitenfalte verbindenden Schenkels zum Schenkel der die randseitige Verbindung mit der ersten Seitenfalte verbindet von 0,1 bis 0,8 beträgt,
4. d) eine Eintrittsöffnung sowie eine Halteplatte in die Bahn des Filtermaterials für die zweite Beutelwand eingebracht wird,

wobei die Bahn des Filtermaterials für die zweite Beutelwand eine Breite B aufweist und die Bahn des Filtermaterials für die erste Beutelwand und die Bahn des Filtermaterials für die zweite Beutelwand eine Länge in einem Verhältnis von > 1,5 aufweisen oder ein entsprechendes Verhältnis durch den Verbindungsschritt c) eingestellt wird, wobei Schritt d) auch vor Schritt a), Schritt b) oder Schritt c) ausgeführt werden kann.Furthermore, the present invention relates to a method for producing a previously described vacuum cleaner filter bag for upright vacuum cleaner according to the invention, in which

1. a) providing a web of filter material for a first bag wall and a web of filter material for a second bag wall, wherein the web of the filter material for the first bag wall is made wider than the web of filter material for the second bag wall,
2. b) in at least the web of the filter material for the first bag wall is at least a first and a second gusset folding comprehensive, so that the gussets parallel or substantially parallel to each other, wherein two legs arise
3. c) the web of the filter material for the first bag wall and the web of the filter material for a second bag wall are superimposed and peripherally connected circumferentially, so that a completely closed vacuum cleaner filter bag is formed, the one between the interior of the first and the second bag wall has formed interior, so that the aspect ratio of connecting the first and second gusset leg to the leg connecting the edge-side connection with the first gusset is from 0.1 to 0.8
4. d) an inlet opening and a holding plate are introduced into the path of the filter material for the second bag wall,

wherein the web of the filter material for the second bag wall has a width B and the web of filter material for the first bag wall and the web of the filter material for the second bag wall have a length in a ratio of> 1.5 or a corresponding ratio by the joining step c ), wherein step d) can also be carried out before step a), step b) or step c).

In the method according to the invention, therefore, in principle two webs of a filter material are welded together circumferentially. At the same time, when the web for the first wall and the second wall of the vacuum cleaner filter bag are brought together, a fold is simultaneously introduced into at least the first wall, preferably only into the first wall, and then the webs are joined together to form the finished vacuum cleaner filter bag, e.g. welded.

It is advantageous here if the web of the filter material for the first bag wall is dimensioned at least 20%, preferably at least 30%, particularly preferably at least 40% wider than the web of the filter material for the second bag wall.

In particular, the process can be carried out continuously, in which the web of the filter material for the first bag wall and the web of the filter material for the second bag wall are dimensioned longitudinally in the longitudinal direction and the ratio of length L to width B is generated by introducing the edge-side connection in the longitudinal direction, after which a single vacuum cleaner filter bag is cut to length.

In addition, it is advantageous if the filter material for the first and second bag wall is a nonwoven material and the edge-side connection is produced by welding, in particular by ultrasonic welding.

Figur 1

zeigt hierbei eine erste, prinzipielle Ausführungsform der vorliegenden Erfindung.

Figur 2a und 2b

zeigen mögliche Positionen der Halteplatte am Staubsaugerfilterbeutel.

Figur 3

zeigt eine bevorzugte Ausführungsform der vorliegenden Erfindung.

Figur 4

zeigt eine weitere Ausführungsform der vorliegenden Erfindung.

Figur 5

verdeutlich das Prinzip der mechanischen Entfaltung des Staubsaugerfilterbeutel aus einem Lager in einem Betriebszustand.

The present invention will be further described by the following explanations, without limiting the invention to the specific details shown.

FIG. 1

shows here a first, basic embodiment of the present invention.

FIGS. 2a and 2b

show possible positions of the retaining plate on the vacuum cleaner filter bag.

FIG. 3

shows a preferred embodiment of the present invention.

FIG. 4

shows a further embodiment of the present invention.

FIG. 5

illustrates the principle of mechanical deployment of the vacuum cleaner filter bag from a warehouse in an operating condition.

FIG. 1 shows a first embodiment of a vacuum cleaner filter bag according to the invention 1. This has two longitudinal sides LS and two narrow sides SS, wherein the in FIG. 1 illustrated lower narrow side SS is shown closed and to illustrate the folding in the vacuum cleaner filter bag, the upper narrow side SS is shown open. In the ready-made state, however, the upper narrow side SS is naturally closed just like the narrow side SS lying underneath. The vacuum cleaner filter bag 1 according to the present invention comprises a first bag wall 2 and a second bag wall 3, wherein in the present case, the first bag wall 2 in the FIG. 1 vorgeliegend is shown. The length of the vacuum cleaner filter bag is indicated by L, the width by B. The two bag walls 2 and 3 are peripherally connected, which in FIG. 1 represented by the reference numeral 4. The compound 4 may be, for example, in the case of nonwoven materials that can be used as a bag wall 2 and 3, a weld. In the FIG. 1 Rear lying second bag wall 3 also includes an inlet opening 5, and a holding plate 6, with the holding plate 6, the vacuum cleaner filter bag 1 in a Upright vacuum cleaner to be fixed. The first bag wall 2 has a fold which comprises a first side fold 21 and a second side fold 22. The folding of the wall thus extends in the longitudinal direction L of the vacuum cleaner filter bag 1 and is formed over the entire length of the wall 2. The first fold comprises two legs, namely a first leg 4-21, which is guided from the left connection 4 of the vacuum cleaner filter bag to the first fold 21, and a second leg 21-22, the first fold 21 with the second fold 22nd combines. The second leg 21-22 of the first fold 21 simultaneously represents the first leg of the second fold 22, in that the leg 21-22 is common to both folds 21 and 22. The second leg 22-4 of the second fold 22 leads from the second fold 22 to the right connection 4 of the vacuum cleaner filter bag.

FIG. 2a shows a first possibility of attaching a holding plate 6 with inlet 5 in the second wall 3 of the vacuum cleaner filter bag. FIG. 2a provides an enlarged section of the mounting portion of the holding plate 6 on the rear wall 3 of the vacuum cleaner filter bag as in FIG. 1 The holding plate has a length L ₆ and a width B ₆ . The smallest distance of the holding plate 6 to the edge-side connection 4 of the narrow side SS is denoted by d. According to this embodiment, it is provided that a certain distance of the retaining plate is not exceeded for marginal connection, so that the retaining plate is arranged as possible on the edge of the vacuum cleaner filter bag to uncomplicated mechanical deployment during insertion or when putting the vacuum cleaner filter bag in an upright vacuum cleaner enable. The details of the mechanical deployment when inserting the vacuum cleaner filter bag 1 in the upright vacuum cleaner will be explained in more detail below.

FIG. 2b showed another way of attaching the retaining plate to the vacuum cleaner filter bag. In this case, the holding plate 6 projects beyond the vacuum cleaner filter bag, ie is led beyond the connection 4 of the upper narrow side SS of the vacuum cleaner filter bag. It should be noted that the inlet opening 5 is still completely inserted in the second wall 3 of the vacuum cleaner filter bag. All reference numerals also for FIG. 2a are used without restriction for the FIG. 2b , The projection of the holding plate 6 is in this case the length of the largest protruding distance, measured from the point of the holding plate 6, which is farthest from the connection to the narrow side SS. In FIG. 2b this route is marked d '.

FIG. 3 shows a particularly preferred embodiment of the vacuum cleaner filter bag 1 according to the invention. This is in principle designed similar to the vacuum cleaner filter bag 1 according to Fig. 1 , However, the vacuum cleaner filter bag 1 has a third fold 21 'and a fourth fold 22' and is formed with respect to the folding mirror-symmetrical to an imaginary, centrally extending longitudinal axis in the longitudinal direction L of the vacuum cleaner filter bag. The second and fourth folds connecting a common leg 22-22 ', the fourth fold and the third fold have a common leg 21'-22', while the third fold over another leg 4-21 'with the in FIG. 3 shown right edge connection is connected. The holding plate 6 is in the in FIG. 3 behind lying bag wall 3 and the leg 22-22 ', which connects the second fold 22 with the fourth fold 22', accommodated opposite.

Another possibility of forming a fold in the vacuum cleaner filter bag is in FIG. 4 shown. Instead of the four explicitly present folds of the vacuum cleaner filter bag as in FIG. 3 pictured, the in FIG. 4 shown vacuum cleaner filter bag a total of 8 folds, which are marked with 21, 22, 23, 24, 21 ', 22', 23 ', 24'ge. The vacuum cleaner filter bag according to Fig. 4 is also mirror-symmetrical with respect to a centrally extending longitudinal axis in the longitudinal direction L of the vacuum cleaner filter bag 1 is formed. The wrinkles with each other have common legs. The retaining plate is for example in the FIG. 4 behind lying bag wall and the fold 24 and the fold 24 'connecting legs 24-24' arranged opposite one another.

In FIG. 5 is the operation of the mechanical deployment of the vacuum cleaner filter bag shown when inserted into an upright vacuum cleaner. In the FIG. 5a The figure shows a vacuum cleaner filter bag according to the invention such as in Fig. 1 respectively. Fig. 3 shown in Location condition. Shown is the supervision on the in Fig. 1 respectively. Fig. 3 shown left longitudinal side LS of the vacuum cleaner filter bag. Visible is the rear wall of the vacuum cleaner filter bag 3, in which the holding plate, however, no folding is introduced, as well as the front wall 2 of the vacuum cleaner filter bag, in which the folding with the gussets 21 and 22 is introduced. In FIG. 5b is on the right side of the vacuum cleaner filter bag in an exemplary position of use, ie shown mechanically unfolded. This use position adjusts itself in that the vacuum cleaner filter bag as in FIG. 5a shown inserted into a vacuum cleaner. Here, the device-side nozzle by the FIG. 5 not shown inlet opening of the holding plate inserted into the vacuum cleaner filter bag. When the vacuum cleaner filter bag is put into operation for the first time, the airflow entering the vacuum cleaner filter bag now strikes the first bag wall 2 with the described folding. Due to the fact that this wall 2 is designed to be very flexible and the incoming air flow due to the existing increased area, which is caused by the convolution, can yield, occurs immediately after the first commissioning of the operating state as in FIG. 5b shown by the vacuum cleaner filter bag is fully unfolded. Another operating state is in FIG. 5c shown. In such a commissioning of the vacuum cleaner filter bag is used in an upright vacuum cleaner, in which the device-side nozzle in FIG. 5 seen introduced from above into the vacuum cleaner filter bag. Here, the holding plate is pivoted about 90 ° upwards, so that the nozzle of a corresponding Upright vacuum cleaner (not shown) through the inlet opening (not shown) can be inserted into the volume interior of the vacuum cleaner filter bag. Due to the existing folding, consisting of the side gussets 21 and 22, the first wall 2 of the vacuum cleaner filter bag has a certain flexibility, so that the wall 2 opens already when opening the retaining flap 6 in the operating position, but especially during the first start of the vacuum cleaner filter bag. In this case, unfolding of the fold so that the evacuation of the vacuum cleaner filter bag takes place, so that the front wall 2 detached from the rear wall 3 and the vacuum cleaner filter bag is opened altogether. If necessary, there is a flexible deformation of the vacuum cleaner filter bag in the upper and lower area, so compared with the storage position the length L of the vacuum cleaner filter bag in operation slightly shorter fails. The vacuum cleaner filter bag is thus fully unfolded before first use, so that blockages etc. can be effectively prevented.

Claims (16)

Vacuum cleaner filter bag (1) for an upright vacuum cleaner having a length (L) and a width (B) in a ratio of> 1.5, so that the vacuum cleaner filter bag has a longitudinal side (LS) and a narrow side (SS), with a first filter material comprising a bag wall (2), a second filter material comprising a bag wall (3), wherein the first (2) and second (3) bag wall peripherally circumferentially connected (4), so that the vacuum cleaner filter bag (1) is completely closed and an inner space is formed between the first (2) and the second bag wall (3), an inlet opening (5) introduced into the second bag wall (3), through which air to be cleaned can flow into the vacuum cleaner filter bag (1), and an inlet opening (5) enclosing retaining plate (6),
characterized,
in that at least the first bag wall (2) has a fold extending at least one first (21) and one second side fold (22) in the longitudinal direction (L) of the vacuum cleaner filter bag (1), the first (21) and second side fold (22 ) parallel or substantially parallel to each other, the first gusset (21) has two legs (4-21, 21-22), and the aspect ratio of the leg (21-22) to the leg (4-21) from 0.1 to 0.8. Vacuum cleaner filter bag (1) according to claim 1, characterized in that the holding plate (6) with inlet opening (5)
is arranged close to a narrow side (SS) of the vacuum cleaner filter bag, so that the ratio of the minimum distance (d) of the holding plate (6) to a narrow side connection (4) of the vacuum cleaner filter bag based on a dimensioning (L ₆ ) of the holding plate (6) Longitudinal direction (L) of the vacuum cleaner filter bag (1) <0.5, preferably <0.2, more preferably from 0.1 to 0, or a narrow side (SS) of the vacuum cleaner filter bag is arranged projecting, so that the ratio of the supernatant (d ') of the holding plate (6) to a narrow-side connection (4) of the vacuum cleaner filter bag based on a dimensioning (L ₆ ) of the holding plate (6) in the longitudinal direction (L) of the vacuum cleaner filter bag (1) <0.5, preferably <0.2, particularly preferably from 0.1 to 0.01. Vacuum cleaner filter bag (1) according to any one of the preceding claims, characterized in that the folding of the first bag wall (2) of the filter material a maximum of eight (21, 22, 23, 24, 21 ', 22', 23 ', 24), preferably a maximum of four Gussets (21, 22, 21 ', 22'). Vacuum cleaner filter bag (1) according to any one of the preceding claims, characterized in that at least the folding of the first bag wall (2) four side folds (21, 22, 21 ', 22'), wherein the fold with respect to the first bag wall (2) formed symmetrically is. Vacuum cleaner filter bag (1) according to the preceding claim, characterized in that the leg (21-22) on the side facing away from the interior of the leg (4-21) is arranged and in a stored state comes to rest on this and a third gusset (21 '; ) has two legs (4-21 ', 21'-22'), wherein the legs (21'-22 ') on the side facing away from the interior of the leg (4-21') is arranged and in a storage state on this Lying comes. Vacuum cleaner filter bag (1) according to one of claims 4 to 5, characterized in that the leg (22-22 ') is dimensioned at least as wide as the width (B ₆ ) of the holding plate (6), preferably the width of the leg (22 -22 ') has 1.1 to 5 times the width (B ₆ ) of the holding plate (6). Vacuum cleaner filter bag (1) according to one of claims 1 to 3, characterized in that at least the folding of the first bag wall (2) has eight side folds (21, 22, 23, 24, 21 ', 22', 23 ', 24), wherein the Folding with respect to the first bag wall (2) is symmetrical. Vacuum cleaner filter bag (1) according to the preceding claim, characterized in that the fold is formed such that the respective legs of the respective side folds come to rest in the stored state, wherein preferably the holding plate is disposed opposite to an outermost leg (24-24 '), which is preferably at least as wide as the width (B ₆ ) of the holding plate (6), wherein more preferably the width of the leg (24-24 ') 1.1 to 5 times the width (B ₆ ) of the holding plate (6). Vacuum cleaner filter bag (1) according to any one of the preceding claims, characterized in that the ratio of length (L) to width (B) is greater than 2, preferably greater than 3. Vacuum cleaner filter bag (1) according to one of the preceding claims, characterized in that the second bag wall (3) has no folding. Vacuum cleaner filter bag (1) according to any one of the preceding claims, characterized in that the filter material of the first (2) and second (3) bag wall is a nonwoven material. Use of a vacuum cleaner filter bag (1) according to one of the preceding claims as a vacuum cleaner filter bag for an upright vacuum cleaner. Method for producing a vacuum cleaner filter bag (1) according to one of Claims 1 to 11, in which a) providing a web of filter material for a first bag wall (2) and a web of filter material for a second bag wall (3), the web of filter material for the first bag wall (2) being made wider than the web of filter material for the first bag wall (2) second bag wall (3), b) in at least the path of the filter material for the first bag wall (2) is at least a first (21) and a second gusset (22) comprehensive folding so that the gussets parallel or substantially parallel to each other, wherein two legs ( 4-21, 21-22), c) the web of the filter material for the first bag wall (2) and the web of the filter material for a second bag wall (3) brought over one another and peripherally peripherally connected (4), so that a completely closed vacuum cleaner filter bag (1) is formed, the one between the first (2) and the second bag wall (3) formed interior, so that the aspect ratio of the leg (21-22) to the leg (4-21) from 0.1 to 0.8, d) an inlet opening (5) and a holding plate (6) is introduced into the path of the filter material for the second bag wall (3), wherein the web of filter material for the second bag wall (3) has a width (B), and the web of filter material for the first bag wall (2) and the web of filter material for the second bag wall (3) has a length (L) in a ratio of> 1.5 or a corresponding ratio is set by the connecting step c),
wherein step d) can also be carried out before step a), step b) or step c). Method according to the preceding claim, characterized in that the web of the filter material for the first bag wall (2) is dimensioned at least 20%, preferably at least 30%, more preferably at least 40% wider than the web of the filter material for the second bag wall (3). Method according to one of the two preceding claims, characterized in that the web of the filter material for the first bag wall (2) and the web of the filter material for the second bag wall (3) are dimensioned longitudinally in the longitudinal direction and the ratio from length (L) to width (B) by inserting the peripheral connection (4) in the longitudinal direction is generated, after which a single vacuum cleaner filter bag (1) is cut to length. Method according to one of claims 13 to 15, characterized in that the filter material for the first (2) and second bag wall (3) is a nonwoven material and the edge-side connection (4) is produced by welding, in particular by ultrasonic welding.

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